Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 43290 10.12737/stp-72202102 Results of current research Results of current research Results of current research Force balance in current sheets in collisionless plasma Force balance in current sheets in collisionless plasma Мингалев Олег Викторович Mingalev Oleg Viktorovich mingalev_o@pgia.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Сецко Павел Владимирович Setsko Pavel Vladimirvoich setsko@pgia.ru Мельник Михаил Николаевич Melnik Mikhail Nikolaevich melnik@pgia.ru Мингалев Игорь Викторович Mingalev Igor Viktorovich mingalev_i@pgia.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Малова Хельми Витальевна Malova Helmi Vitalyevna hmalova@yandex.ru Мерзлый Алексей Михайлович Merzlyi Alexey Mihaylovich pinega142@yandex.ru Полярный геофизический институт РАН Апатиты Россия Polar Geophysical Institute RAS Apatity Russian Federation Мурманский арктический государственный университет Апатиты Россия Murmansk Arctic State University Apatity Russian Federation Полярный Геофизический институт РАН Апатиты Россия Polar Geophysical InstituteRAS Apatity Russian Federation Полярный геофизический институт РАН Апатиты Россия Polar Geophysical Institute RAS Apatity Russian Federation Полярный геофизический институт РАН Апатиты Россия Polar Geophysical Institute RAS Apatity Russian Federation Мурманский арктический государственный университет Апатиты Россия Murmansk Arctic State University Apatity Russian Federation Научно-исследовательский институт ядерной физики им. Д.В. Скобельцына МГУ Москва Россия Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow Russian Federation Институт космических исследований РАН Москва Россия Space Research Institute RAS Moscow Russian Federation Институт космических исследований РАН Москва Россия Space Research Institute RAS Moscow Russian Federation 7 2 11 21 06 04 2021 01 06 2021 https://zh-szf.ru/en/nauka/article/43290/view

In this paper, we derive a divergent form of the force balance equation for collisionless plasma in the quasineutrality approximation, in which the electric field and current density are excluded. For a stationary spatially one-dimensional current sheet with a constant normal component of the magnetic field and magnetized electrons, the general form of the force balance equation has been obtained for the first time in the form of a conservation law. An equation in this form is necessary for the correct formulation of boundary conditions when modeling asymmetric current sheets, as well as for the control of the stationarity of the numerical solution obtained in the model. Furthermore, the fulfillment of this equation is considered for two types of stationary configurations of a thin current sheet, which are obtained using a numerical model. The derived equation makes it possible to develop models of asymmetric current sheets, in particular current sheets on the magnetopause flanks in the magnetotail.

In this paper, we derive a divergent form of the force balance equation for collisionless plasma in the quasineutrality approximation, in which the electric field and current density are excluded. For a stationary spatially one-dimensional current sheet with a constant normal component of the magnetic field and magnetized electrons, the general form of the force balance equation has been obtained for the first time in the form of a conservation law. An equation in this form is necessary for the correct formulation of boundary conditions when modeling asymmetric current sheets, as well as for the control of the stationarity of the numerical solution obtained in the model. Furthermore, the fulfillment of this equation is considered for two types of stationary configurations of a thin current sheet, which are obtained using a numerical model. The derived equation makes it possible to develop models of asymmetric current sheets, in particular current sheets on the magnetopause flanks in the magnetotail.

 collisionless plasma Vlasov equation current sheet numerical simulation Earth’s magnetosphere magnetized electrons collisionless plasma Vlasov equation current sheet numerical simulation Earth’s magnetosphere magnetized electrons

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